diff --git a/system-environment/file-system.nix b/system-environment/file-system.nix
index 478155a..fc601da 100644
--- a/system-environment/file-system.nix
+++ b/system-environment/file-system.nix
@@ -5,6 +5,7 @@
         nextcloud-client
         calibre
         unzip
+        deja-dup
     ];
 
     environment.variables = {